1963

8.1

1925

7.6

1984

8.1

2005

5.3

2008

5.5

2006

7.4

1989

7.4

2014

6.1

1958

6.8

1980

6.0

1993

7.1

2006

6.0

2004

6.8

2007

0.0

1999

7.3

2005

6.6

1955

5.0

1976

3.0

1978

7.5

1962

7.3